Salt water proof?

[AL_N_VB]

Check this article out regarding the Smart cast portable sonar for us land-lubbers http://espn.go.com/outdoors/fishing/s/f_fea_gadgets_high-tech03_wire.html

Wadda you think?A pretty expensive toy to have,but will it help catch fish?Does any1 have one?Is it Salt Water Proof?
Need to know,3 of my buds wants to chip in and get 1.

[Sandcrab]

Check out the previous posts on this item.
http://www.pierandsurf.com/cgi-bin/ultbb/ultimatebb.cgi?ubb=get_topic&f=4&t=001605

[AL_N_VB]

Does not really specify if it was intended for salt water use.